Accurate Spitzer infrared radius measurement for the hot Neptune GJ 436b M. Gillon, B.-O. Demory, T. Barman, X. Bonfils, T. Mazeh, F. Pont, S. Udry, M. Mayor and D. Queloz A&A, 471 3 (2007) L51-L54 Published online: 30 July 2007 DOI: 10.1051/0004-6361:20078283